Material slitter



May 29, 1951 B. B. ROGERS mmzm. SLITTER 2 Sheets-Sheet 1 Filed July 17, 1948 EWEMTR 29.6%

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MATERIAL SLITTER 2 Sheets-Sheet 2 Filed July 17, 1948 INVEN'TIIIR;

A TT [I R N E Y Patented May 29, 1951 warren stares-rarest orri cs MATERIAL SLITTER Basil B. Rogers, Gananoque, Ontario, Canada Application July 17, 1948, Serial No. 39,343

1 Claim. (01. 164-60) The objects of the invention are to devise a. slitter which will facilitate the slitting of all types:

of sheet material in roll form, such as paper, rubber, tin aluminum foils, cellophane, brass shim stock, certain textiles, plastics and the like; to

construct a material slitter in which the cutting means may be definitely located with respect to the same and remain in that position; to speed up operations in. the slitting of calender rolls and the like; to furnish a mechanism that will be simple to manufacture, precision like in performance and consisting of inexpensive inter-- changeable parts; to equip a paper slitter with a superior clamping means thus increasing the efiiciency of the same; to assure that the cutting. means will be centrally located with respect to,

the slitter regardless of whether this cutting means is sharpened with the cutting edge offcentre is relation to the width of same; to eliminate lateral or radial vibration in the cutting means of a paper slitter; to perfect a paper slitter in which the cutting means will rotate freely,

regardless of radial or thrust pressure on same;

and generally to provide a paper slitter that will be durable in construction and efficient in use.

Inthe drawings:

Figure 1 is a side View showing the'slitter in an operating position.

Figure 2 is a front view of Figure 1.

Figure 3 is a view as taken on the line 3-3 in Figure 1.

Figure 4 is a sectional view as taken on the line 4-4 in Figure 3.

Figure 5 is a sectional view as taken on the line 5-5 in Figure 3.

Figure 6 is a sectional view as taken on the line 66 in Figure l.

Figure 7 is a side view showing a modification of the slitter.

Figure 8 is a view of the modification as taken on the line 8-8 in Figure 7.

Like numerals of reference indicate corresponding parts in the various figures.

Referring to the drawings, the slitter shown in Figure 1 consists of a frame or bracket, as indicated by the numeral l5, which may be cast or 2, otherwise formed of any suitable material. The forward portion of the frame i5 has a vertically inclined channel shaped recess it in same which is adapted to accommodate the shank or plunger ll of the slitter. The cover plate is is fixedly secured over the channel shaped recess l6 in the frame [5 thus providing a means of slidably maintaining the shank I! in this recess; The

pins or dowels I5A are a press fit in the frame [5 and engage in locating holes in the coverpla'te" l8, thus maintaining the position of the latter at all times with respect to the frame E5. The cover plate H3 is then fixedly secured in its predetermined position on the frame by meansof 3 the screws I8A.

The shank ll, which, in this instance, is square extends upward and outward from the frame [5 and forms a yoke IS on the end thereof. Each section of the yoke I9 forms pillow blocks and 2! which are adapted to support the ball bearings 22 and 23. The bearing caps 2- 1. and 25 are secured on the pillow blocks -26 and 2! by the screws 26 thus providing a means of adjustably securing the bearings laterally with respect to' the shank ll. The spindle 2'! extends laterally through the ball bearings 22 and 23 and has the blade 28 mounted thereonl This spindle has an enlarged head on one end thereof and is adapted to have a retaining nut thrEaded on the other end of same, thus providing a means of substantially securing the blade, bearings and spindle in a single unit.

The slot or notch 29 in the upper edge of the cover plate I8 is adapted to locate the edge of the blade 28 in the centre of the unit as a whole. The blade 28 is placed so that the corners of the notch 29 engage both inclined edges thereof, simultaneously. The bearings caps 2i and 25 are then tightened down on the pillow blocks 29 and 2! by means of the screw 25, thus fixing the blade, bearings and spindle securely in position:

In this manner the cutting edge of the blade 28 will be centrally located regardless of whether the same is sharpened with the cutting edge off-- 3 stantially lock the former in any suitable position. The knurled head 36 on the adjusting screw 32 facilitates rotating the same thus regulating the tension on the spring 30 by engaging the spring retaining member 3|. The pin 31 is fixedly secured in the frame i and projects into the channel shaped recess iii in same. The shank I! has a recessed slot 38 in the surface of same which is adapted to accommodate the projecting portion of the pin 31, thus determining the extreme movement in either direction of this shank.

The felt strip or wick 39 is suitably mounted on the frame and adapted to lubricate the blade 28 with a light film of oil when slitting hard thick material, thus prolonging the life of the blade. The lower end of this felt strip is accommodated in the cylindrical portion or oil reservoir 40 which is formed on the reinforcing rib 4| of the frame 15. The felt strip extends upward from the cylindrical portion 40, passes through the slot 42 in the frame, and is supported at the upper end thereof by the trough-like portion which extends outward from this frame.

The clamping means for the paper slitter is formed on the rear portion of the frame. The upper gripping jaw 44 is an integral part of the frame 15 and tapers rearward and downward with respect to same. The lower gripping jaw or block 45 is slidably mounted in the channel formation 46 which forms the lower rear portion of the frame 15. The guide pin 41 is fixedly secured in the upper and lower walls of the channel formation 46 and adapted to have the lower gripping jaw 45 slidably fitted thereon. The lead screw 48 is threaded into the lower wall of the channel formation 46 and engages the bottom surface of the lower gripping jaw 45 thus providing a means of raising and lowering the same. The lead screw 48 is provided with the handle 49 which is slidably fitted in same thus facilitating the adjustment of the former. In this respect the frame 15 may be easily mounted on the support bar 50 or removed therefrom by simply adjusting the lower gripping jaw 45 with respect to the same.

The definite location of the cutting edge of the blade 28 with respect to the unit as a whole facilitates the spacing of a plurality of these unitsby the repeated use of a single gauge or spacer the required size to space the knives the required distances apart.

In the modification shown in Figures 7 and 8 the slitter is similar to that of the foregoing with the exception that this paper slitter is more compact and adapted for lighter duty than that of the former. Furthermore, in this respect, the blade 51 is located close to the clamping means of the frame 52, and the shank 53 which is slidably fitted in the frame is parallel to this clamping means; whereas the shank ll which is slidablyfitted in the frame 15 is angularly disposed with respect to the clamping means of the same.

In the operation of the invention the slitter is placed in position on a suitable support so that the blade of the same will substantially en- 5 gage the material to be cut. In this respect the material 54 is supported on the roller 55'and suitably guided by the idler rollers 56 and 51. The blade 28 which is suitably supported by the shank or plunger ll of the unit presses against the idler roller 51 and as the material 54 is drawn therebetween the same is slitted by the pressure of this blade on the idler roller 5'1. The pressure of the blade 28 on the idler roller 51 as hereinbefore described may be suitably increased or decreased by means of the adjusting screw 32 in co-operation with the spring 30.

What I claim is:

In a material slitter, a frame having the forward portion thereof in the shape of a vertically inclined channel shaped recess, a plunger accommodated in the channel shaped portion of said frame, and a cover plate fixedly secured over the channel shaped recess in said frame for slidably maintaining said plunger therein, the cross section of said plunger being square, the upper portion of said plunger being in the form of a yoke, and each section of said yoke forming pillow blocks, ball bearings supported by said pillow blocks, bearing caps holding said ball bearings in position and being secured to said pillow blocks, a spindle extending laterally through said ball bearings, and a blade mounted on said spindle, said cover plate having a slot in the upper edge thereof permitting said blade to extend therethrough, the lower portion of said plunger being hollow, a spring accommodated in the hollow portion of said plunger, a spring retaining member engaging the lower end of said spring, a retaining plate enclosing the lower end of the channel shaped recess in said frame, an adjusting screw threaded into said retaining plate and bearing against said spring retaining member, a pin fixedly secured in said frame and projecting into the channel shaped recess thereof, said plunger having a recessed slot therein in which said pin projects for determining the extreme movement of said plunger in either direction, a wick mounted on said frame and adapted to engage said blade, an oil reservoir located below said wick and into which the same extends, an upper gripping jaw being integral with said frame, a lower gripping jaw slidably mounted on the rear of said frame, a guide pin fixedly secured in said frame and slidably engaging said lower gripping jaw, a lead screw threaded into said frame and engaging the bottom surface of said lower gripping jaw thus providing a means of raising and lowering the same, and a handle slidably fitted in the lower end of said lead screw.

B. B. ROGERS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 465,575 Inman et a1. Dec. 22, 1891 479,473 Stock July 26, 1892 1,510,656 Clements Oct. 7, 1924 1,895,852 Johnstone Jan. 31, 1933 FOREIGN PATENTS Number Country Date 2,046 Great Britain Jan. 27, 1904 191,215 Switzerland Aug. 16, 1937 

